<div class="translate" id="helioplot_intro"></div>

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<u>Legend:</u>
<p></p>

<ol>
  <li>
    barycentric age = x &plusmn; y 
    <span class="show4model1 hide4model2 hide4model3">
      (| z)
    </span>
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    <translate class="where"></translate>
    <p></p>
    <table>
      <tr>
	<td>x:</td>
	<td class="translate" id="helioplot_t"></td>
      </tr>
      <tr>
	<td>y:</td>
	<td>
	  <translate class="err"></translate>
	  <translate class="12sigmaci"></translate>.
	</td>
      </tr>
      <tr class="show4model1 hide4model2 hide4model3">
	<td>
	  z:
	</td>
	<td><translate class="err_disp"></translate></td>
      </tr>
    </table>
  </li>

  <li class="show4model1 hide4model2 hide4model3">
    MSWD = x, p(&chi;<sup>2</sup>) = y 
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    <translate class="where"></translate>
    <p></p>
    <table>
      <tr>
	<td>x:</td>
	<td class="translate" id="helioplot_mswd_x"></td>
      </tr>
      <tr>
	<td>
	  y:
	</td>
	<td class="translate" id="helioplot_mswd_y"></td>
      </tr>
    </table>
  </li>

  <li class="hide4model1 hide4model2 show4model3">
    dispersion = x &plusmn; y 
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    <p></p>
    <table>
      <tr>
	<td>x:</td>
	<td class="translate" id="helioplot_omega"></td>
      </tr>
       <tr>
	<td>y:</td>
	<td>
	  <translate class="err"></translate>
	  <translate class="12sigmaci"></translate>.
	</td>
      </tr>
    </table>
  </li>
  
</ol>

<p></p>
<translate class="references"></translate>
<p></p>

Aitchison, J., 1982, The statistical analysis of compositional data.
<i>Journal of the Royal Statistical Society</i>, v. 44, p. 139-177.

<p></p>

Aitchison, J., 1986, <i>The statistical analysis of compositional
data</i>.  London, Chapman and Hall, 416 p.

<p></p>

Vermeesch, P., 2008. Three new ways to calculate average (U-Th)/He
ages.
<i>Chemical Geology</i>, 249(3), pp.339-347.

<p></p>

Vermeesch, P., 2010. HelioPlot, and the treatment of overdispersed
(U-Th-Sm)/He data. <i>Chemical Geology</i>, 271(3), pp.108-111.
